{"title":"Single Stage Engines","description":"\u003cp\u003ePower your next flight with Estes single-stage model rocket engines, proven safe, consistent, and reliable through more than 500 million launches. Designed to carry a rocket through its entire powered flight using one motor, single-stage engines are the standard choice for most beginner, sport, scale, and high-altitude model rockets.\u003c\/p\u003e\n\n\u003cp\u003eExplore a wide range of engine classes and delay times for rockets of different sizes, weights, and performance goals. Choosing the recommended engine provides the thrust needed for a stable liftoff while timing the ejection charge to deploy the recovery system near the peak of the flight.\u003c\/p\u003e\n\n\u003cp\u003eThousands of Estes engines are static-tested at the factory to verify reliability and adherence to performance specifications. Estes model rocket engines meet applicable code requirements from the National Fire Protection Association and California State Fire Marshal, and are certified by the National Association of Rocketry.\u003c\/p\u003e","products":[{"product_id":"d12-5-engine-bulk-pack","title":"D12-5 Engine Bulk Pack","description":"\u003cp\u003eThe D12-5 Engine Bulk Pack is built for rocketeers who want reliable D-impulse performance in a convenient, launch-ready format. These motors are a great match for medium-weight kits and two-stage rockets that need a stronger lift-off and a predictable coast-to-recovery profile. Use them when you want added altitude and a confident, repeatable flight every time you head to the field.\u003c\/p\u003e\n\n\u003cp\u003eBeyond raw power, the D12-5 shines because of its consistency. Each motor produces a clean, steady burn that reduces variability between flights, so you’ll see similar altitudes and flight behavior across launches. That predictability makes the D12-5 particularly useful for learning how changes in payload, fin design, or recovery systems affect performance—valuable whether you’re teaching beginners, running a club launch, or flying with the family.\u003c\/p\u003e\n\n\u003cp\u003ePerformance highlights include a total impulse of 20.00 N·s, a 5 second time delay, a maximum lift weight of about 10.0 oz (283 g), and a peak thrust of 32.90 N with a thrust duration around 1.60 seconds. These specs make the D12-5 powerful enough for rockets such as Green Eggs, Big Daddy, and Odyssey while remaining predictable and easy to manage at the launch site. The 24 mm diameter and compact form factor mean wide compatibility with many popular Estes kits and aftermarket mounts.\u003c\/p\u003e\n\n\u003cp\u003eReady to step up your flights? The D12-5 Engine Bulk Pack gives you the power and consistency to learn, experiment, and enjoy more successful launches. As always, follow the included safety and handling instructions, use the recommended recovery gear, and launch in a safe, legal area. Order your pack today and get more of the high-altitude, reliable flights that keep people coming back to the pad.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":44470251749681,"sku":"001786","price":86.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/1786-D12-5-Rocket-Engines-Bulk-Pack.png?v=1721770200"},{"product_id":"c11-3-engine-bulk-pack","title":"C11-3 Engine Bulk Pack","description":"\u003cp\u003eThe C11-3 Engine Bulk Pack gives you twelve ready-to-fly C-class motors engineered for consistent lifts and eye-catching altitudes. Each motor produces a strong but controllable burst of thrust and a 3-second delay that works well with medium-weight rockets — ideal for weekend hobbyists, family launch days, and solo flyers who want exciting flights without stepping up to larger, more complex powerplants.\u003c\/p\u003e\n\n\u003cp\u003eBeyond raw numbers, the C11-3 shines because of its reliability and repeatability. Whether you’re testing trim changes, teaching a new builder the basics, or simply chasing higher flights, these engines reduce the variability that can spoil a flight day. The familiar, crisp ignition and predictable delay let you tune recovery systems with confidence so recovery is clean and repairs are minimal.\u003c\/p\u003e\n\n\u003cp\u003eTechnically tuned for mid-to-high altitude performance, the C11-3 offers a total impulse of 10.00 N·s, peak thrust suitable for rockets with a max lift weight around 6.0 oz (170 g), and a short 0.80 second thrust duration that gets rockets off the pad quickly. Dimensionally these are standard 24 mm diameter motors — a match for many of our popular mid-size kits and ideal for repeat launches during a club meet or family outing.\u003c\/p\u003e\n\n\u003cp\u003eSafety-first and user-friendly, these bulk packs include starters, starter plugs, and plenty of recovery wadding so your focus stays on flying. Always follow Estes and NAR safety guidelines when handling and installing motors, and store engines in a cool, dry place. Ready to step up your launch day? The C11-3 bulk pack is a reliable way to fill your flight schedule with consistent, thrilling launches.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":44470273114417,"sku":"001726","price":82.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/products\/1726_C11-3_Box.png?v=1673970410"},{"product_id":"c6-5-engine-bulk-pack","title":"C6-5 Engine Bulk Pack","description":"\u003cp\u003eThe Estes C6-5 Engine Bulk Pack is the ultimate choice for rocketeers who want maximum altitude and excitement from their launches. As the highest impulse engine available in a bulk pack, the C6-5 gives students, hobbyists, and youth groups the chance to see their rockets soar higher than ever before. With reliable performance and powerful thrust, this engine makes every launch an unforgettable experience.\u003c\/p\u003e\n\n\u003cp\u003ePerfect for classrooms, rocket clubs, and large group activities, the C6-5 engine is designed for rockets weighing under 4 ounces. Its balanced combination of strong lift and a 5-second delay ensures smooth flights and dependable parachute deployments. This makes it an excellent engine for demonstrations and educational launches where consistency and excitement are key.\u003c\/p\u003e\n\n\u003cp\u003eEstes engine bulk packs are built with convenience in mind, giving you all the supplies you need to keep your launches running smoothly. Instead of worrying about running out of engines or parts, this bulk pack equips you with everything required for 24 complete launches. It’s a simple and cost-effective way to support larger groups of rocketeers.\u003c\/p\u003e\n\n\u003cp\u003eWith the Estes C6-5 Engine Bulk Pack, you’ll have the power, reliability, and quantity to inspire your students or group with thrilling flights. Watch rockets roar off the pad, climb high into the sky, and return safely thanks to Estes’ trusted engineering. When you want your launches to impress, the C6-5 delivers.\u003c\/p\u003e\n\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":44470353756465,"sku":"001789","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/products\/1789_EDU_BulkEnginePack_C6-5.png?v=1673972209"},{"product_id":"b6-4-engine-bulk-pack","title":"B6-4 Engine Bulk Pack","description":"\u003cp\u003eThe Estes B6-4 Engine Bulk Pack is a trusted choice for rocketeers who want dependable power and altitude in their launches. Known as a medium impulse engine, the B6-4 strikes the perfect balance of thrust and delay, making it a versatile option for rockets of many sizes. If you’re looking for engines that can handle larger or heavier rockets while still delivering impressive flights, this bulk pack is a great fit.\u003c\/p\u003e\n\n\u003cp\u003eBeyond their power, B6-4 engines are known for their consistency. They provide smooth launches, reliable deployments, and repeatable performance that keeps each launch day running smoothly. This makes them ideal not just for casual rocketeers, but also for groups or educators who need engines that perform consistently across multiple launches.\u003c\/p\u003e\n\n\u003cp\u003eWith enough supplies to launch 24 rockets, Estes bulk packs are convenient and cost-effective. The included starters, plugs, and recovery wadding mean you’ll spend less time gathering materials and more time enjoying the excitement of rocketry. It’s everything you need to keep a classroom, youth group, or club stocked and ready for launch day.\u003c\/p\u003e\n\n\u003cp\u003eThe Estes B6-4 Engine Bulk Pack is compatible with several popular Estes bulk pack rockets, including the Generic E2X, Alpha III, Wizard, Viking, and Alpha. Whether you’re expanding your fleet or supporting a large group activity, this engine pack is designed to make launches more seamless and more exciting every time.\u003c\/p\u003e\n \n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":44470359589169,"sku":"001783","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/products\/1783_EDU_BulkEnginePack_B6-4.png?v=1673972224"},{"product_id":"a8-3-engine-bulk-pack","title":"A8-3 Engine Bulk Pack","description":"\u003cp\u003eThe Estes A8-3 Engine Bulk Pack is designed to make group launches simple, safe, and exciting. As one of the most reliable single-stage engines in the Estes lineup, the A8-3 is ideal for rockets weighing less than 3 ounces. It provides a stable thrust and a 3-second delay, making it a favorite for classrooms, clubs, and hobbyists who want to see the full rocket flight profile from lift-off through recovery.\u003c\/p\u003e\n\n\u003cp\u003eWhat sets the A8-3 apart is its consistency. These engines offer predictable performance, giving rocketeers the confidence that each flight will showcase the thrill of model rocketry without surprises. It’s a beginner-friendly engine that still delivers excitement, making it an excellent choice for first-time flyers and group programs alike.\u003c\/p\u003e\n\n\u003cp\u003eEach bulk pack includes enough engines, starters, plugs, and recovery wadding to power 24 launches. That means less time worrying about running out of supplies and more time enjoying hands-on STEM activities, competitions, and outdoor fun. With easy-to-use components and a reputation for safety, Estes engine bulk packs are designed to simplify setup and maximize enjoyment.\u003c\/p\u003e\n\n\u003cp\u003eThe A8-3 Engine Bulk Pack is recommended for use with Estes rocket bulk packs such as the Alpha, Alpha III, Generic E2X, Wizard, and Viking. Pairing these rockets with the A8-3 ensures exciting yet manageable flights, perfect for classrooms, scout groups, and community rocketry events. Give your next launch day everything it needs with this convenient, ready-to-use engine bulk pack.\u003c\/p\u003e\n\n \u003cp\u003eUse Estes A8-3 engines to launch these bulk pack rockets -\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eAlpha Rocket Bulk Pack (12 pk)\u003c\/li\u003e\n \u003cli\u003eAlpha III Bulk Pack (12 pk)\u003c\/li\u003e\n \u003cli\u003eGeneric E2X Bulk Pack (12 pk)\u003c\/li\u003e\n \u003cli\u003eWizard Bulk Pack (12 pk)\u003c\/li\u003e\n \u003cli\u003eViking Bulk Pack (12 pk)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":44470362374449,"sku":"001781","price":92.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/products\/1781_EDU_BulkEnginePack_A8-3.png?v=1673972231"},{"product_id":"blast-off-bulk-pack","title":"Blast-Off® Bulk Pack","description":"\u003cp\u003eThe Estes Blast-Off® Bulk Pack is the ultimate value for rocketeers who want more launches, more excitement, and more opportunities to push their rockets sky-high. This carefully curated assortment brings together our top-selling engines, giving you the perfect balance of power and performance for a wide variety of model rockets.\u003c\/p\u003e\n\u003cp\u003eWith a mix of A, B, and C class engines, this pack ensures you’ll have the right power for any flight day. The A8-3 engines are ideal for smaller, lighter rockets and lower altitude flights, while the B6-4 provides a step up in performance with reliable thrust and altitude. For those ready to go even higher, the C6-3 and C6-5 deliver impressive flights that soar hundreds of feet, thrilling rocket fans of all ages. Having this variety on hand means you’re ready for any rocket in your fleet, from beginner builds to more advanced flyers.\u003c\/p\u003e\n\u003cp\u003eBeyond the engines themselves, the Blast-Off® Bulk Pack makes launching easy and convenient. It comes complete with starters and recovery wadding, so you’ll be fully equipped for multiple launch sessions. No need to run out for extras; just load, ignite, and watch your rockets take flight again and again. This convenience makes it perfect for families, hobbyists, and anyone looking to maximize their time at the launch field.\u003c\/p\u003e\n\u003cp\u003eWhether you’re stocking up for a season of launches or simply want the peace of mind of having the right engines ready to go, the Blast-Off® Bulk Pack delivers unmatched value and performance. Estes has been fueling model rocket adventures for over 60 years, and this bulk pack is one of the best ways to keep your rockets flying high with the engines trusted by rocketeers worldwide.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":44470400221489,"sku":"001672","price":114.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/products\/1672_EDU_BlastOffPack.png?v=1673972509"},{"product_id":"f15-4-engine-bulk-pack","title":"F15-4 Engine Bulk Pack","description":"\u003cp\u003eThe Estes F15-4 Engine Bulk Pack gives hobby rocketeers reliable, high-performance power at a great value. This bulk pack contains everything you need to fuel eight launches - 8 F15-4 engines, 10 starters, and 8 starter plugs - making it ideal for group launches, club events, or anyone who likes to keep spare engines on hand for fast turnaround. These full-size 29 mm engines bring mid-power performance for larger model rockets while keeping handling and storage simple.\u003c\/p\u003e\n\u003cp\u003eBuilt for rocketeers who want dependable altitude and clean, repeatable performance, the F15-4 balances strong thrust with a predictable burn profile. The engine delivers a robust 49.61 N-sec of total impulse and a 4 second delay for comfortable recovery timing, so it launches heavier hobby rockets cleanly without sacrificing control. Whether you fly for fun, display, or competition, the F15-4’s consistent ignition and stable thrust make it a favorite when you need confidence on the pad.\u003c\/p\u003e\n\u003cp\u003eKey flight specs you’ll want to know - total impulse 49.61 N-sec, time delay 4 seconds, max lift weight 21.0 oz (595 g), max thrust 25.26 N, thrust duration ~3.45 seconds. Each engine measures 4.5 in (11.4 cm) long, 29 mm diameter, and weighs about 3.59 oz (101.8 g) with 2.12 oz (60.0 g) of propellant. Recovery wadding is not included, so be sure to add wadding and a properly sized parachute or streamer for safe recovery. These engines are designed for rockets that accept 29 mm motors and for flyers who follow established safety practices.\u003c\/p\u003e\n\u003cp\u003eStock up, save, and spend more time launching. The F15-4 Engine Bulk Pack is ready when you are. Add this pack to your next cart to streamline prep for club launches, backyard sessions, or classroom demo days. Always follow the NAR model rocketry safety code, use appropriate recovery wadding and a certified launch controller, and launch only in approved open areas.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":45583523414321,"sku":"001787","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/F15-4_PKG.png?v=1687447763"},{"product_id":"a3-4t-engine-flight-pack","title":"A3-4T Engine Flight Pack","description":"\u003cp\u003eThe Estes A3-4T Flight Pack delivers a balanced combination of performance and control, making it an excellent option for lightweight model rockets. With a total impulse of 2.50 N-sec and a 4-second delay, the A3-4T is ideal for small, streamlined rockets needing a gentle but reliable boost. Its short thrust duration of 0.6 seconds provides a quick lift-off while leaving plenty of time for a safe recovery sequence.\u003c\/p\u003e\n\u003cp\u003eThis engine can lift rockets weighing up to 2.0 oz (57 g), making it best suited for mini engine-powered models with 13mm engine mounts. It reaches impressive speeds and altitudes with a max thrust of 6.8 newtons, delivering a strong initial push before handing off to recovery deployment. The 4-second time delay offers sufficient coasting time for many light rockets before the ejection charge fires.\u003c\/p\u003e\n\u003cp\u003eThe compact design, just 1.8 inches in length and weighing only 0.28 oz, ensures a perfect fit in small model rockets where space and mass efficiency are critical. Despite its small size, the A3-4T engine packs a dependable performance punch, thanks to Estes’ precise engineering and safety-tested reliability.\u003c\/p\u003e\n\u003cp\u003eEach A3-4T Flight Pack comes complete with four A3-4T engines, four starters, four starter plugs, and twelve sheets of recovery wadding. It’s everything you need to keep your low-weight rockets flying smoothly and safely time after time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":49767747027249,"sku":"010058","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010058-A3-4T-FP-Bag.png?v=1752171372"},{"product_id":"f15-6-engines","title":"F15-6 Engines (29 mm)","description":"\u003cp\u003eTake your mid-powered rocket flights to new heights with the Estes F15-6 Engine. This 29 mm engine packs an impressive 49.61 N-sec total impulse and delivers a maximum thrust of 25.26 Newtons, giving your rockets the boost they need for strong, stable launches. It’s ideal for experienced modelers looking for consistent, long-duration thrust and reliable performance across a wide variety of heavier rocket designs.\u003c\/p\u003e\n\u003cp\u003eWith a 6-second delay between burnout and recovery deployment, the F15-6 is tailored for mid-size rockets that benefit from longer coast phases. This extended delay allows rockets to climb to higher altitudes before the ejection charge activates, maximizing performance in rockets with slightly heavier payloads or larger airframes. The 3.45-second burn time provides a smooth and powerful push, enhancing flight dynamics and altitude potential.\u003c\/p\u003e\n\u003cp\u003eAt 4.5 inches in length and weighing just 3.66 ounces, this engine fits rockets that use 29 mm engine mounts and is especially useful for flights where precise timing and altitude gains are important. It’s a reliable choice for rockets requiring a balance between thrust power and delay timing. The propellant weight of 2.12 ounces ensures you get a high-energy burn for exciting liftoffs and a thrilling flight experience every time.\u003c\/p\u003e\n\u003cp\u003eWhether you’re launching for fun, altitude, or testing your rocketry design skills, the F15-6 delivers a dependable and rewarding launch experience. Pair it with your favorite Estes rocket that calls for an F-engine and enjoy the confidence that comes with top-tier performance and long burn capability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":50317619691825,"sku":"010032","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/EstesF15-6Engines.png?v=1733435616"},{"product_id":"f15-4-engines","title":"F15-4 Engines (29 mm)","description":"\u003cp\u003eTake your flights to the next level with the Estes F15-4 engine, a powerful mid-power engine designed for model rocket enthusiasts seeking longer thrust duration and higher lift capabilities. With 49.61 N-sec of total impulse and a max thrust of 25.26 Newtons, this engine is built to launch heavier rockets to stunning altitudes with confidence and control.\u003c\/p\u003e\n\u003cp\u003eThe F15-4 offers more than just raw power, it’s engineered for dependable, sustained flight. The 4-second delay provides a balanced coast period after burnout, ideal for deploying parachutes or other recovery systems at peak altitude. Its long 3.45-second thrust duration gives your rocket a smooth, graceful ascent, minimizing stress on airframes while maximizing trajectory efficiency.\u003c\/p\u003e\n\u003cp\u003eThis engine is a popular choice for larger rockets in the Estes Pro Series II line and other compatible 29 mm models. Its consistent performance makes it an excellent pick for hobbyists looking to upgrade from E-class engines while staying within the ease of single-use, black powder propulsion. Whether you're launching for sport, altitude records, or payload testing, the F15-4 delivers dependable performance every time.\u003c\/p\u003e\n\u003cp\u003eWith its powerful thrust profile, long burn, and mid-delay deployment, the Estes F15-4 is perfect for high-performance rockets weighing up to 21 ounces. Expand your launch capabilities and experience the next level of model rocketry excitement with this hard-working engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":50318733082929,"sku":"010031","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/F15-4-Engines-Package.png?v=1733279815"},{"product_id":"e16-4-engines","title":"E16-4 Engines (29 mm)","description":"\u003cp\u003eThe E16-4 Engines (29 mm) by Estes Rockets deliver powerful and reliable performance for mid to high-powered model rockets. Ideal for single-stage flights or upper stages of multi-stage designs, these engines provide an impressive total impulse of 33.68 N-sec and a 4-second delay for optimal parachute deployment. Whether you're launching larger rockets or experimenting with advanced models, the E16-4 is the perfect choice for rocketeers seeking precision and altitude.\u003c\/p\u003e\n \u003cp\u003eDesigned for rockets weighing up to 20 ounces (566 grams), the E16-4 engine ensures smooth and consistent thrust, lifting your rocket to incredible heights. Each package includes two engines, two starters, and four starter plugs, making it easy to prepare for multiple launches. Whether you're an advanced hobbyist or looking to expand your fleet with higher-performance options, the E16-4 offers a dependable and exhilarating experience.\u003c\/p\u003e\u003cp\u003eWith its reliable thrust and versatility, the E16-4 Engine is an essential addition to any rocketeer’s collection. Launch your next adventure with confidence and experience the power of Estes!\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":50549969813809,"sku":"010033","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010033-E16-4--Rocket-Engines-Bag.png?v=1750110753"},{"product_id":"e16-6-engines","title":"E16-6 Engines (29 mm)","description":"\u003cp\u003eThe E16-6 Engine (29 mm) is a high-performance model rocket engine designed for single-stage rockets or as the upper stage in multi-stage configurations. With a total impulse of 33.68 N-sec and a 6-second delay, this engine is perfect for larger rockets needing a powerful and reliable boost. Ideal for advanced rocketeers, the E16-6 engine ensures smooth flights and precise parachute deployment for a safe and exciting recovery.\u003c\/p\u003e\u003cp\u003eEach package includes two engines, two starters, and four starter plugs, giving you everything needed for two launches. With the ability to lift rockets weighing up to 16 ounces (453 grams) to impressive altitudes, the E16-6 delivers reliable performance and exhilarating results. Whether you're flying rockets like the Pro Series II™ Majestic™ or experimenting with custom designs, this engine offers the thrust you need to elevate your rocketry experience.\u003c\/p\u003e\u003cp\u003eWith its reliable thrust and high-altitude capability, the E16-6 Engine is an essential addition for advanced rocketry enthusiasts. Ready to power your next launch?\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":50574659879217,"sku":"010034","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010034-E16-6-Bag.png?v=1740758374"},{"product_id":"b6-4-engine-flight-pack","title":"B6-4 Engine Flight Pack","description":"\u003cp\u003eThe Estes B6-4 Engine Flight Pack is an ideal upgrade for rocketeers ready to launch mid-size model rockets with reliable power and performance. With a total impulse of 5.00 N-sec and a thrust duration of 0.8 seconds, these engines are built to deliver strong takeoffs and smooth mid-flight transitions for a wide range of rocket kits. Each engine is equipped with a 4-second delay, allowing for optimal coast time before deployment.\u003c\/p\u003e\n \u003cp\u003eCapable of lifting rockets up to 4.0 ounces (113 grams), the B6-4 engine is perfect for mid-weight models that require a balance of power and stability. Whether you're experimenting with new designs or flying a trusted favorite, this engine offers consistent launches and dependable ejection timing. The max thrust of 12.10 newtons (2.7 lbs) gives your rocket the punch it needs to get airborne fast.\u003c\/p\u003e\n \u003cp\u003eEach flight pack comes with everything you need for multiple launches: 3 B6-4 engines, 4 starters, 4 starter plugs, and 12 sheets of recovery wadding. With all components conveniently included, you can spend more time building and flying, and less time gathering materials. The recovery wadding helps protect your parachute or streamer from the engine’s ejection charge, ensuring your rocket is ready for its next flight.\u003c\/p\u003e\n \u003cp\u003eIf you're looking to elevate your next launch with a tried-and-true engine that delivers solid performance, the B6-4 is a go-to favorite among hobbyists. With its balanced power and ideal delay, it’s a versatile choice for a wide range of rocket designs.\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":50583695294769,"sku":"010055","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010055-B6-4-Flight-Pack.png?v=1753475118"},{"product_id":"c11-3-engines","title":"C11-3 Engines","description":"\u003cp\u003ePower your mid-sized model rockets with confidence using the Estes C11-3 Engines. These powerful motors are designed for launches that require more thrust than a standard B engine but don’t need the altitude of a D-class engine. With a total impulse of 10.00 N·s, the C11-3 provides reliable, solid acceleration and a controlled 3-second delay before ejection, ideal for rockets with larger airframes or heavier payloads.\u003c\/p\u003e\n\u003cp\u003eThe 3-second delay gives rockets just enough time to reach peak altitude before deploying the recovery system, ensuring safe and consistent descents. Perfect for mid-weight kits or scale models, the C11-3 bridges the gap between lower and higher power flights, making it a versatile choice for rocketeers looking to optimize performance without overshooting field constraints.\u003c\/p\u003e\n\u003cp\u003eEach pack includes 2 C11-3 engines, along with 2 starters and 4 starter plugs, so you’re ready for multiple successful launches right out of the box. Count on the Estes C11-3 for dependable mid-power performance that takes your model rocketry experience to new heights.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51301104582961,"sku":"010025","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/C11-3-Engines-010025.png?v=1745944942"},{"product_id":"a8-3-engines","title":"A8-3 Engines","description":"\u003cp\u003eThe A8-3 is one of Estes’ most popular engines, and for good reason. With a powerful yet manageable thrust profile, it’s designed to launch lightweight model rockets up to 500 feet. The 3-second delay allows the rocket to coast at apogee before deploying the recovery system, resulting in picture-perfect flights and gentle landings.\u003c\/p\u003e\n\u003cp\u003eThis engine is ideal for use in smaller, single-stage rockets and offers a great introduction to model rocketry. Whether you're learning the basics or refining your skills, the A8-3 provides a reliable and predictable flight experience that helps build confidence with every launch.\u003c\/p\u003e\n\u003cp\u003eEach A8-3 engine is precision-manufactured for consistent performance, so you can trust it to deliver a thrilling liftoff and smooth recovery every time. It's an excellent option for schools, camps, STEM programs, or anyone seeking a safe and satisfying launch.\u003c\/p\u003e\n\u003cp\u003eThe A8-3 three-pack includes everything needed for multiple flights, including starters and plugs. Just add your favorite Estes rocket and a launch system, and you're ready to take off.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51399740555569,"sku":"010017","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010017-A8-3-Engines-Package.png?v=1748020869"},{"product_id":"b6-4-engines","title":"B6-4 Engines","description":"\u003cp\u003eThe B6-4 is a widely trusted and well-balanced engine that offers reliable performance across a variety of model rocket kits. With a moderate level of thrust and a 4-second delay, it allows rockets to coast effectively before activating the recovery system, making it ideal for rockets that benefit from a longer delay phase after burnout.\u003c\/p\u003e\n\u003cp\u003eDesigned for single-stage rockets weighing less than 4.0 ounces, the B6-4 engine delivers consistent results and controlled recoveries, making it a great fit for both new flyers refining their skills and seasoned hobbyists looking for dependable flight profiles.\u003c\/p\u003e\n\u003cp\u003eWhether you're launching for fun or using rockets in a STEM learning environment, the B6-4 engine provides an excellent combination of power, altitude, and control. Its predictable performance has made it a go-to for generations of rocketeers.\u003c\/p\u003e\n\u003cp\u003eEach 3-pack includes everything you need for multiple flights: three B6-4 engines, starters and plugs. Just pair with your favorite Estes rocket and launch system for a fun and educational experience.\u003c\/p\u003e\n\u003cp\u003eATTENTION: \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51399857963313,"sku":"010021","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010021-B6-4-Engines-Package.png?v=1748024807"},{"product_id":"d12-5-engines","title":"D12-5 Engines","description":"\u003cp\u003eThe Estes D12-5 engine is a high-thrust motor built for model rockets that need strong liftoff power and a longer coast before deploying their recovery system. With a 5-second delay between engine burnout and ejection, it gives your rocket extra time to climb before the parachute or other recovery method activates—perfect for heavier rockets or those designed for extended flights.\u003c\/p\u003e\n \u003cp\u003eThis engine is a great match for a variety of Estes kits and custom builds that support D-engine power. Whether you're flying a single-stage rocket or the upper stage of a multi-stage setup, the D12-5 delivers reliable, consistent performance with every launch. The longer delay helps improve flight stability and timing, giving your rocket a smoother arc and more controlled descent.\u003c\/p\u003e\n \u003cp\u003eEach package includes two D12-5 engines, two starters, and four starter plugs. You’ll have what you need to get your rocket ready for the next launch, with parts that fit easily into standard Estes engine mounts. Everything is packaged with care and built to meet Estes’ trusted quality standards.\u003c\/p\u003e\n \u003cp\u003eWhether you’re moving up from smaller C engines or fine-tuning a more advanced rocket, the D12-5 is a solid, dependable choice. It offers the right mix of power and delay for rockets that need a little more time in the sky before coming back to Earth.\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51437394133297,"sku":"010028","price":15.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010028-D12-5-Bag.png?v=1748964252"},{"product_id":"d12-3-engines","title":"D12-3 Engines","description":"\u003cp\u003eThe Estes D12-3 engine delivers high-thrust power for heavier model rockets that require a shorter delay before deployment. Ideal for larger, draggy airframes or rockets with broad fins, this engine provides the force needed to achieve stable, safe flights from liftoff to recovery. With its balanced 3-second delay, the D12-3 is engineered for rockets that need their recovery systems to activate shortly after peak altitude, helping prevent tumble or drift.\u003c\/p\u003e\n \u003cp\u003eAs part of the D engine family, the D12-3 is known for its punchy boost and reliability, making it a solid choice for rockets designed with extra weight or staging complexity. Whether you're flying a single-stage rocket that needs a quick deployment or experimenting with payloads, this engine offers a dependable performance profile that hobbyists trust.\u003c\/p\u003e\n \u003cp\u003eEach pack includes two D12-3 engines, along with two starters and four starter plugs, giving you what you need for multiple launch attempts or quick back-to-back flights. Estes engines are precision-manufactured and quality-tested to meet rigorous standards, ensuring consistent and safe ignition every time.\u003c\/p\u003e\n \u003cp\u003eTrusted by generations of rocketeers, the D12-3 bridges the gap between performance and control. It's a go-to choice for those looking to expand their skills with more demanding models while maintaining Estes’ signature dependability and ease of use.\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51450039992625,"sku":"010027","price":15.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010027-D12-3-Bag.png?v=1749232050"},{"product_id":"1-2a6-2-engines","title":"1\/2A6-2 Engines","description":"\u003cp\u003eThe Estes 1\/2A6‑2 engine is a single-stage, standard 18 mm engine tailored for rockets weighing under 2 oz (57 g) including engine, perfect for lightweight beginner models and small-field flights. Each package includes three engines, four igniters, and four starter plugs, so you’re ready to launch multiple rockets straight out of the box.\u003c\/p\u003e\n\u003cp\u003eWith a total impulse of 1.25 N‑s, a peak thrust of 8.90 N (2.0 lb), and a brief thrust duration of just 0.30 s, the 1\/2A6‑2 delivers smooth yet dependable lift-off for small-scale rockets. After engine burn-out, the 2-second delay allows the rocket to coast to apogee before ejection, producing a controlled and safe recovery without overstressing your model.\u003c\/p\u003e\n\u003cp\u003eMeasuring 2.75″ in length and sized at 18 mm diameter, this engine complements a wide range of Estes beginner kits like Alpha III®, Hi‑Flier®, Wizard™, and Astron Constellation™, providing ideal performance for short to moderate altitude launches. At only 0.48 oz (13.6 g) with 0.10 oz (2.7 g) of propellant, it offers a well-balanced thrust-to-weight ratio for stable flight dynamics.\u003c\/p\u003e\n\u003cp\u003ePerfect for educational use, backyard launches, and STEM programming, the 1\/2A6‑2 is a trusted engine that consistently delivers repeatable results. Its combination of modest power, simplicity, and high reliability continues the Estes legacy of making model rocketry accessible and fun for all levels of rocketeers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51459579642161,"sku":"010016","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010016-1-2-A6-2-Bag.png?v=1749485510"},{"product_id":"1-2a3-2t-engines","title":"1\/2A3-2T Engines","description":"\u003cp\u003eThe Estes 1\/2A3‑2T engine is a single-stage mini engine designed specifically for lightweight model rockets, especially those built on BT-5 (13 mm) airframes. Ideal for backyard launches or small-field use, this engine delivers a dependable lift-off experience for smaller, beginner rockets. Each pack includes four motors, four igniters, and four starter plugs, ready for multiple launches right out of the box.\u003c\/p\u003e\n\u003cp\u003eOffering a total impulse of 1.25 N‑s, peak thrust of approximately 8.3 N (1.9 lb), and a short thrust duration of 0.30 s, the 1\/2A3‑2T provides a quick and spirited liftoff without overtaxing lightweight models. Following burnout, a 2-second delay gives your rocket time to coast to apogee before deploying its recovery system, minimizing stress on both rocket and engine.\u003c\/p\u003e\n\u003cp\u003eCompact yet powerful, this 13 mm engine measures 1.75″ in length, weighs just 0.23 oz (6.5 g), and contains 0.07 oz (1.9 g) of propellant. Its size and energy make it a perfect match for mini rockets like the Mini Alpha™, Mini Bertha™, Mini Der Red Max™, Mini Mod™, and Mini Honest John™.\u003c\/p\u003e\n\u003cp\u003eWhether used in educational settings, STEM programs, or hobbyist launches at home, the 1\/2A3‑2T offers consistent and reliable performance. Built to Estes’ high standards, it’s a trusted engine for rocketeers who prioritize simplicity, repeatability, and fun in small-package launches.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51459677618481,"sku":"010011","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010011-1-2-A3-2T-Bag.png?v=1749487609"},{"product_id":"c6-5-engines","title":"C6-5 Engines","description":"\u003cp\u003eThe Estes C6‑5 engine is a single-stage, 18 mm standard engine crafted for rockets weighing less than 4 oz (113 g) including the motor. Perfect for mid-sized beginner and intermediate rockets, it offers a powerful yet controlled flight experience. Each pack includes three C6‑5 engines, four igniters, and four starter plugs, making it easy to launch multiple rockets with minimal prep.\u003c\/p\u003e\n \u003cp\u003eThis engine delivers a total impulse of 10 N‑s, a sustained average thrust of 15.3 N (3.4 lb), and a burn duration of approximately 1.6 seconds—ideal for achieving moderate altitude lift-offs. With a 5‑second delay between burnout and ejection, it gives rockets ample time to coast to apogee for smooth recovery system deployment.\u003c\/p\u003e\n \u003cp\u003eMeasuring 2.8″ long and 18 mm in diameter, the C6‑5 fits a wide range of Estes rockets like Antar™, Big Bertha®, AstroCam®, and Alpha III®. Weighing just 0.85 oz (24.1 g) with 0.43 oz (12.2 g) of propellant, this engine balances power and precision, delivering consistent flight trajectories every time.\u003c\/p\u003e\n \u003cp\u003eBacked by Estes’ legacy of quality and reliability, the C6‑5 is a go-to for educational programs, hobbyist launches, and model rocket enthusiasts seeking dependable mid-power performance. It ensures repeatable, safe, and exciting flights for a wide spectrum of flying environments.\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51459933995313,"sku":"010024","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010024-C6-5-Bag.png?v=1749491791"},{"product_id":"c6-3-engines","title":"C6-3 Engines","description":"\u003cp\u003eThe Estes C6-3 engine is one of the most versatile and reliable model rocket motors available, offering high-thrust performance tailored for a wide range of medium-sized rockets. Designed for flights that balance altitude and recovery timing, this single-stage engine is a favorite among both novice hobbyists and seasoned rocketeers. Whether you're launching for fun or conducting an educational demonstration, the C6-3 provides a consistent and powerful launch every time.\u003c\/p\u003e\n\u003cp\u003eWith a total impulse of 10.00 Newton-seconds and a 3-second delay, the C6-3 is ideal for rockets that require a shorter coast time before deploying a parachute or recovery system. This makes it well-suited for rockets that are slightly heavier or that benefit from quicker ejection. You'll get impressive altitude while minimizing drift, perfect for smaller launch areas or when recovery location matters.\u003c\/p\u003e\n\u003cp\u003eEach C6-3 engine pack includes three engines, along with starters and starter plugs, so you're fully equipped for your next mission. As with all Estes engines, you can count on strict quality control and safety standards. Just insert the engine into a compatible rocket, connect your launch system, and get ready for liftoff. It’s engineered simplicity with explosive fun.\u003c\/p\u003e\n\u003cp\u003eThe C6-3 is compatible with a wide variety of Estes kits that require a C-class engine and benefit from a shorter delay. It's an excellent choice when you want the power of a full C engine without a long coast phase, especially for rockets with faster descent profiles or lower altitude ceilings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51529597616433,"sku":"010023","price":14.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010023-C6-3-Bag.png?v=1774459898"},{"product_id":"e12-6-engines","title":"E12-6 Engines","description":"\u003cp\u003eThe Estes E12-6 engine is a high-thrust workhorse designed for mid- to large-sized model rockets. With a powerful boost and a 6-second delay, it’s perfect for flights where altitude and performance matter most. This engine is ideal for heavier rockets that need extra force off the launch pad while still ensuring safe and timely recovery system deployment.\u003c\/p\u003e\n \u003cp\u003eCapable of lifting rockets weighing up to 14 ounces, the E12-6 provides reliable, sustained thrust for models that require extended coasting before ejection. The longer delay makes it especially well-suited for rockets with sleek, efficient designs that benefit from more time to climb after burnout. Whether you're flying a Pro Series II rocket or another advanced model, the E12-6 delivers dependable, high-altitude flights.\u003c\/p\u003e\n \u003cp\u003eEach package includes 2 engines, 2 igniters, and 4 reusable starter plugs, giving you everything you need for two full launches. Estes' precision-engineered engines are rigorously tested for quality and performance, giving you peace of mind when it’s time to launch. Just pair it with the right launch pad and controller, and you’re ready for a powerful takeoff.\u003c\/p\u003e\n \u003cp\u003eWhether you're upgrading from D-class motors or optimizing for longer coast times, the E12-6 is the go-to engine for rocketeers ready to push their rockets to greater heights. It's the ideal choice for experienced flyers who want big performance in a versatile, easy-to-use format.\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51597039534385,"sku":"010030","price":27.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010030-E12-6-Bag.png?v=1751553943"},{"product_id":"c6-5-engine-flight-pack","title":"C6-5 Engine Flight Pack","description":"\u003cp\u003ePower up your next mission with the Estes C6-5 Engine Flight Pack—your all-in-one bundle for multiple high-flying rocket launches. This versatile engine is designed for single-stage rockets that weigh up to 4 ounces, delivering a strong thrust followed by a 5-second delay for safe recovery deployment. Whether you’re working through your first kit or planning a weekend of back-to-back launches, the C6-5 gives you reliable, consistent performance every time.\u003c\/p\u003e\n \u003cp\u003eEach flight pack includes 3 C6-5 engines, along with 4 starters, 4 reusable plugs, and 12 sheets of flame-resistant recovery wadding—everything you need for three complete flights. No extra purchases or guesswork required. Just prep your rocket, head to the launch field, and let the countdown begin.\u003c\/p\u003e\n \u003cp\u003eThe C6-5 is a go-to engine for intermediate-level rocketeers, ideal for rockets that need a balance between altitude and coast time before deploying a parachute. With proper setup, it can send your rocket soaring hundreds of feet into the sky before triggering recovery at just the right moment.\u003c\/p\u003e\n \u003cp\u003eWhether you're flying solo, with friends, or as part of a local club, this flight pack makes it easy to stay launch-ready. Grab a pack, fuel your next adventure, and experience the thrill of model rocketry with trusted Estes quality in every component.\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51608604803377,"sku":"010056","price":15.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010056-C6-5-FP-Bag.png?v=1751916068"},{"product_id":"a8-3-engine-flight-pack","title":"A8-3 Engine Flight Pack","description":"\u003cp\u003eThe Estes A8-3 Engine Flight Pack is a dependable choice for model rocket enthusiasts of all experience levels. Designed for lightweight rockets, these low-thrust engines provide steady performance with a smooth 3-second delay and reliable ejection charge. Whether you're introducing someone to rocketry or heading out for a casual launch session, the A8-3 delivers consistent, safe results.\u003c\/p\u003e\n \u003cp\u003eThis all-in-one pack comes with everything you need for three complete launches: three A8-3 engines, four starters, four plugs, and 12 sheets of recovery wadding. With an extra starter included and plenty of wadding to protect your rocket’s parachute system, you’ll be set for multiple flights with minimal prep.\u003c\/p\u003e\n \u003cp\u003eEach A8-3 engine features a thrust duration of 0.8 seconds, offering a controlled boost that's perfect for smaller, lightweight rockets. The 3-second delay provides an ideal coast phase before the ejection charge deploys the recovery system, supporting smooth, predictable flight patterns and safe landings.\u003c\/p\u003e\n \u003cp\u003eSimple to prep and easy to fly, the A8-3 Flight Pack makes launching rockets a fun and approachable activity. Whether you’re flying solo, with friends, or introducing kids to the hobby, this pack offers convenience, performance, and peace of mind in every launch.\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51608963186993,"sku":"010054","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010054-A8-3-FP-Bag.png?v=1751920659"},{"product_id":"c5-3-engines","title":"C5-3 Engines","description":"\u003cp\u003eWhen your rocket needs a fast, steady boost and an earlier recovery, the Estes C5-3 engine delivers. With a total impulse of 10.00 N-sec and a thrust duration of 1.85 seconds, this 18 mm engine is engineered to provide a longer, sustained push off the launch pad, making it a strong match for mid-weight rockets and high-drag designs.\u003c\/p\u003e\n\u003cp\u003eThe 3-second delay ensures timely recovery system deployment, which is especially important for rockets with a max lift weight of up to 8.0 oz. That shorter delay window minimizes coast time and helps deploy parachutes earlier in the flight arc, leading to safer, more predictable landings; perfect for designs that don't benefit from long coasts or for flying in variable wind conditions.\u003c\/p\u003e\n\u003cp\u003eEach pack contains 3 C5-3 engines, 4 starters, and 4 starter plugs, giving you everything you need to prep for multiple launches. Just add your recovery wadding, launch pad, and controller, and you’re ready for a high-thrust experience backed by Estes’ consistent engine quality and safety.\u003c\/p\u003e\n\u003cp\u003eWhether you're testing new rocket configurations or simply want tighter control over recovery timing, the C5-3 engine offers a reliable balance of power and performance. It’s a go-to choice for intermediate rocketeers looking to expand their engine lineup with something both powerful and precise.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51611544977713,"sku":"010022","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010022-C5-3-Bag.png?v=1751991341"},{"product_id":"b4-4-engines","title":"B4-4 Engines","description":"\u003cp\u003eThe Estes B4-4 Rocket Engines are ideal for mid-powered model rockets that demand a steady climb and reliable deployment. These single-stage, 18 mm engines offer a balanced performance with moderate thrust, making them a great choice for both new hobbyists and seasoned flyers looking for consistent flight results. The B4-4 is specifically designed for rockets weighing less than 3.5 ounces, including the engine, and provides dependable altitude and ejection timing for small to mid-size models.\u003c\/p\u003e\n\u003cp\u003eThese engines feature a thrust duration that supports a smooth boost phase, followed by a 4-second delay that allows rockets to reach peak altitude before recovery system deployment. This delay makes the B4-4 especially suitable for rockets with moderate drag and stable flight characteristics. Whether you're launching in a park, field, or on a certified range, you can count on a satisfying launch profile with every flight.\u003c\/p\u003e\n\u003cp\u003eEach package includes three B4-4 engines along with four starters and four plugs, giving you everything needed for multiple launches. The extra starter adds an extra level of convenience and value, ideal for those who like to be prepared on launch day. Estes' attention to safety and performance ensures that each engine delivers the reliability that model rocket enthusiasts have trusted for decades.\u003c\/p\u003e\n\u003cp\u003eWhether you're conducting a classroom demo, building your personal fleet, or hosting a weekend launch session, the B4-4 engine is a proven performer. Its moderate power and predictable deployment make it a smart option for a wide range of Estes kits and compatible low- to mid-weight rockets. Get ready for consistent results and fun flights with this time-tested engine.\u003c\/p\u003e\n\u003cp\u003eEstes B4-4 Model Rocket Engines are compatible with a large number of Estes rocket kits, including but not limited to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1225 Alpha\u003c\/li\u003e\n\u003cli\u003e1292 Wizard\u003c\/li\u003e\n\u003cli\u003e1261 Baby Bertha\u003c\/li\u003e\n\u003cli\u003e1946 Boosted Bertha\u003c\/li\u003e\n\u003cli\u003e1948 Big Bertha\u003c\/li\u003e\n\u003cli\u003e1949 Viking\u003c\/li\u003e\n\u003cli\u003e2008 Generic 2X\u003c\/li\u003e\n\u003cli\u003e2021 Cadet\u003c\/li\u003e\n\u003cli\u003e2056 US Army Patriot\u003c\/li\u003e\n\u003cli\u003e2092 Mongoose\u003c\/li\u003e\n\u003cli\u003e2169 Dragonite\u003c\/li\u003e\n\u003cli\u003e2178 Hi-Flier\u003c\/li\u003e\n\u003cli\u003e2452 Athena\u003c\/li\u003e\n\u003cli\u003e2483 Phantom Blue\u003c\/li\u003e\n\u003cli\u003e7000 Bull Pup 12D\u003c\/li\u003e\n\u003cli\u003e7220 Crossfire ISX\u003c\/li\u003e\n\u003cli\u003e7245 Comanche-3\u003c\/li\u003e\n\u003cli\u003e7259 Nike-X\u003c\/li\u003e\n\u003cli\u003e7281 Corvette\u003c\/li\u003e\n\u003cli\u003e7284 Starship\u003c\/li\u003e\n\u003cli\u003e7291 Space Corps Centurion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51615494177073,"sku":"010019","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010019-B4-4-Bag.png?v=1752072479"},{"product_id":"b6-2-engines","title":"B6-2 Engines","description":"\u003cp\u003eThe Estes B6-2 is a standard single-stage model rocket engine engineered for reliable, repeatable flight performance. Delivering a total impulse of 5.00 N-sec and a peak thrust of 12.10 newtons (2.7 lbs), this 18 mm diameter engine provides a strong boost phase, making it ideal for rockets with a maximum lift weight of 4.5 ounces (127 g). The 2-second delay allows for a controlled coast phase before activating the ejection charge, helping ensure stable recovery deployment and consistent flight profiles.\u003c\/p\u003e\n\n\u003cp\u003eWith a thrust duration of 0.80 seconds, the B6-2 supplies a quick and powerful liftoff that suits rockets designed for lower altitude flights or those requiring early deployment. This engine is an excellent match for kits where a shorter delay improves flight stability and recovery system timing. Whether used for test flights or routine launches, the B6-2 delivers the dependable thrust curve that hobbyists expect from Estes engines.\u003c\/p\u003e\n\n\u003cp\u003eEach engine pack includes three B6-2 engines, four starters, and four starter plugs, providing a complete solution for multiple launch setups. The included starters ensure reliable ignition, while the plugs secure the starters in place for optimal performance. This all-in-one package is ideal for rocketeers who want everything ready for their next launch without needing additional components.\u003c\/p\u003e\n\n\u003cp\u003eBacked by Estes’ legacy of quality and precision manufacturing, the B6-2 engine is trusted for its balanced performance characteristics. Its combination of quick thrust, short delay, and proven reliability makes it a go-to choice for hobbyists seeking consistent results flight after flight.\u003c\/p\u003e\n\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51642365509937,"sku":"010020","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010020-B6-2-Bag.png?v=1752699018"},{"product_id":"a3-4t-engines","title":"A3-4T Engines","description":"\u003cp\u003eThe Estes A3-4T engine is a single-stage mini model rocket engine built for lightweight rockets and designed to deliver consistent, reliable performance. With a total impulse of 2.50 N-sec and a peak thrust of 6.80 newtons (1.5 lbs), this 13 mm diameter engine provides a solid boost for rockets weighing up to 2.0 ounces (57 g). Its 4-second delay allows for a steady coast before the ejection charge activates, helping ensure a controlled flight and dependable recovery system deployment.\u003c\/p\u003e\n\u003cp\u003eWith a thrust duration of 0.60 seconds, the A3-4T delivers a quick, moderate-power lift-off that’s ideal for rockets requiring a longer delay before ejection. Whether you're launching a favorite kit or testing a new build, the A3-4T supplies reliable thrust and timing that supports a predictable flight path, perfect for hobbyists looking for dependable performance from a mini engine.\u003c\/p\u003e\n\u003cp\u003eEach engine pack includes four A3-4T engines, four starters, and four starter plugs, everything you need for multiple launches. The included starters and plugs ensure reliable ignition with every flight, eliminating the need to purchase ignition components separately and making launch preparation simple and efficient.\u003c\/p\u003e\n\u003cp\u003eKnown for its consistent performance and Estes’ trusted manufacturing quality, the A3-4T is a dependable choice for model rocketeers flying lightweight rockets. Its proven design, balanced thrust, and predictable delay make it a go-to engine for reliable single-stage flights.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51642497466673,"sku":"010013","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010013-A3-4T-Bag.png?v=1752702668"},{"product_id":"a10-3t-engines","title":"A10-3T Engines","description":"\u003cp\u003eThe Estes A10-3T Engines are high-thrust mini engines built for exciting launches with lightweight model rockets. Designed as single-stage engines, they deliver quick and powerful liftoffs, making them a favorite for hobbyists who crave fast acceleration and short coast times. With a 3-second delay, these engines are great for rockets that are small, nimble, and engineered for quick altitude gains before deploying recovery systems.\u003c\/p\u003e\n \u003cp\u003eKnown for their punchy performance in compact builds, the A10-3T offers a perfect blend of speed, simplicity, and fun. Its 13.00 Newton max thrust provides plenty of power for light rockets, while the 0.80-second thrust duration keeps flights brisk and exhilarating. Whether you’re running test flights, experimenting with new designs, or just enjoying weekend launches, these engines provide reliable, consistent results that keep the countdowns coming.\u003c\/p\u003e\n \u003cp\u003eThe A10-3T’s compact size and mini engine classification make it compatible with a wide range of Estes mini rockets and launch gear. If you're looking for dependable propulsion in a small package, this engine delivers a high-performance experience without the bulk. It's a great option for younger fliers, new hobbyists, or seasoned rocketeers who enjoy tight, fast flights.\u003c\/p\u003e\n \u003cp\u003eEach package includes 4 A10-3T engines, 4 starters, and 4 starter plugs—everything needed to get airborne fast. Pair with recovery wadding and a mini launch pad to complete your setup and send your rocket skyward with confidence.\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51671619109169,"sku":"010015","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010015-A10-3T-Bag.png?v=1753467018"},{"product_id":"c11-5-engines","title":"C11-5 Engines","description":"\u003cp\u003eThe Estes C11-5 engine delivers a powerful punch for mid-weight rockets ready to soar. This single-stage engine features a 24 mm diameter and 10.00 N-sec of total impulse, making it a reliable choice for modelers looking for extra lift without moving up to E-class engines. Whether you're launching for altitude or demonstrating flight consistency, the C11-5 offers performance you can count on.\u003c\/p\u003e\n\u003cp\u003eWith a 5-second delay, the C11-5 strikes a great balance between boost and recovery deployment, ideal for rockets that require more coast time to maximize altitude before ejection. It delivers up to 22.10 newtons of max thrust, giving your rocket the force it needs to get off the pad with authority. The C11-5’s power and profile make it a perfect fit for rockets that are too heavy for a B or C6 but not quite ready for an E engine.\u003c\/p\u003e\n\u003cp\u003eThe engine’s 0.80-second thrust duration ensures a quick and responsive launch phase, helping stabilize your rocket as it climbs. With a max lift weight of 5.0 oz (142 g), the C11-5 works well with a wide range of mid-sized rocket kits in the Estes lineup and beyond. It’s a versatile choice for flyers who want to push their altitudes while keeping control and reliability at the forefront.\u003c\/p\u003e\n\u003cp\u003eEach pack includes two engines, two starters, and four starter plugs, everything you need to power two thrilling flights. Whether you're a seasoned modeler or taking your next step up in engine class, the Estes C11-5 brings confidence and performance to your next launch.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51682195538225,"sku":"010026","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010026-C11-5-Bag.png?v=1753751416"},{"product_id":"e12-4-engines","title":"E12-4 Engines","description":"\u003cp\u003eThe Estes E12-4 engine delivers impressive power and reliability for your next launch, making it a top choice for rocketeers ready to step up from smaller engines. With a 24mm diameter and 30.00 N-sec of total impulse, this versatile engine provides consistent, exciting flights that never fail to thrill. Whether you’re building new rockets or upgrading existing favorites, the E12-4 offers dependable thrust and excellent performance across a variety of models.\u003c\/p\u003e\n\n\u003cp\u003eEngineered with precision and designed for excitement, the E12-4 is perfect for upper stage flights but can also be used as a single stage engine. With a strong maximum thrust of 30.60 Newtons and a thrust duration of 2.70 seconds, it strikes the perfect balance between raw lift-off power and sustained acceleration. The 4-second delay adds an ideal pause before ejection, creating smooth, realistic flight sequences that mimic the real thing.\u003c\/p\u003e\n\n\u003cp\u003eCapable of lifting rockets up to 17 ounces, the E12-4 is an excellent choice for mid-size rockets that need just the right amount of strength to reach soaring altitudes. It’s a versatile addition to your engine collection, giving you flexibility to experiment with different models and flight profiles while ensuring reliable ignition and performance every time you launch.\u003c\/p\u003e\n\n\u003cp\u003eEach E12-4 engine pack comes with everything you need to get flying quickly, including starters and starter plugs for easy setup. Whether you’re preparing for a weekend launch or stocking up for multiple flights, the Estes E12-4 ensures that every mission begins with the perfect balance of power, timing, and excitement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":51773853106481,"sku":"010029","price":27.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010029-E12-4-Bag.png?v=1756235736"},{"product_id":"f15-2-engines","title":"F15-2 Engines (29 mm)","description":"\u003cp\u003eDesigned for rockets that use 29mm motors, the F15-2 Engines deliver strong lift and a long 3.45 second burn for higher altitude flights and impressive launch performance. Their long burn time keeps your rocket climbing higher, while the powerful thrust curve ensures stable, straight liftoffs. When properly mounted and balanced, these engines support rockets weighing up to 21.0 oz and deliver the kind of performance that keeps you coming back to the launch pad.\u003c\/p\u003e\n\u003cp\u003eThe F15-2 Engines are also a great value, combining high performance with consistency you can trust flight after flight. They’re a great choice for larger model rockets, club launch days, and experienced hobbyists looking for stronger lift and longer burn time. You’ll get strong ignition, reliable ejection, and clean recovery timing every time, so you can focus on enjoying the experience instead of troubleshooting.\u003c\/p\u003e\n\u003cp\u003eThis pack includes two F15-2 Engines, two starters, and four starter plugs, giving you everything needed for a pair of thrilling launches. It is a convenient way to restock your launch gear or a perfect gift for any rocketeer ready to step up their power. Load them up, prep your rocket, and get ready to feel the roar of Estes performance.\u003c\/p\u003e\n\u003cp\u003eAlways follow the recommended installation and safety instructions before flight. Bring power and reliability to your next launch with the F15-2 Engines and enjoy the excitement that only Estes rocketry can deliver.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52038983221553,"sku":"010009","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/F15-2-Model-Rocket-Engines-Package.png?v=1763675724"},{"product_id":"b4-2-engines","title":"B4-2 Engines","description":"\u003cp\u003eEngineered for straightforward, repeatable performance, the Estes B4-2 provides the reliable thrust you want from a standard model rocket engine. Its balanced burn delivers predictable altitude and recovery timing, making it an ideal choice for beginners learning flight dynamics as well as experienced fliers who appreciate consistent results.\u003c\/p\u003e\n\u003cp\u003eWhat makes the B4-2 stand out is its combination of ease of use and dependable manufacturing quality. The casing and propellant formulation produce clean, steady thrust with consistent delay timing, which reduces variability between flights. That consistent performance helps you tune recovery systems, estimate apogee, and teach flight concepts with confidence.\u003c\/p\u003e\n\u003cp\u003eThe B4-2 is versatile in application. Use it for small display flights, classroom demos, club launches, and friendly competitions where predictable, safe performance matters. Its size and impulse make it a great match for a wide range of lightweight rockets and kits without adding unnecessary complexity to your build.\u003c\/p\u003e\n\u003cp\u003eEach pack is ready-to-launch friendly and ideal for stocking your launch box. Pick up a pack of B4-2 engines when you want dependable flights, simple prep, and more time enjoying launches. Add them to your next order and get back to what matters most, launching rockets and having fun.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52136557019441,"sku":"010018","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010018-B4-2-Rocket-Engines.png?v=1764528926"},{"product_id":"1-4a3-3t-engines","title":"1\/4A3-3T Engines","description":"\u003cp\u003eThe Estes 1\/4A3-3T engine is a compact single stage engine designed specifically for lightweight model rockets. This 4 pack gives hobbyists a convenient bundle that includes everything needed to power four quick flights, including engines, starters, and starter plugs, all in one purchase.\u003c\/p\u003e\n\n\u003cp\u003eWhat makes these mini engines great is their consistency. The 1\/4A3-3T is engineered to produce steady, repeatable thrust so each flight behaves the way you expect. That reliability is ideal for new flyers learning the basics, for group events where predictable performance matters, and for experienced builders who want a small engine with dependable results.\u003c\/p\u003e\n\n\u003cp\u003eDespite its small size, this engine delivers real performance with a total impulse of 0.625 N-sec and a 3 second delay for reliable deployment timing. The short burn and low weight make it perfect for delicate airframes and foam or balsa builds where a gentle boost and soft recovery help keep rockets intact and ready to fly again.\u003c\/p\u003e\n\n\u003cp\u003eFor safe and satisfying flights, pair the 1\/4A3-3T with the recommended recovery gear and a proper launch setup. Always follow Estes safety guidelines and local launch rules. Add dependable mini power to your next project and enjoy smooth, repeatable launches.\u003c\/p\u003e\n\n\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52368763486513,"sku":"010010","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010010-1-4-A3-3T-Model-Rocket-Engines-Package.png?v=1768433734"},{"product_id":"a3-2t-engines","title":"A3-2T Engines","description":"\u003cp\u003eThe Estes A3-2T mini engine delivers a neat balance of gentle power and a short, dependable delay. This 13mm motor produces a crisp boost that carries very light rockets to their peak quickly, then times a 2 second coast for a clean transition to recovery. It is ideal for models that weigh up to the mini engine limits and for flyers who want satisfying altitude without complex setup.\u003c\/p\u003e\n\u003cp\u003eWhat makes the A3-2T stand out is its consistency and user friendly performance. Expect reliable starts, predictable thrust duration, and repeatable delays so you can focus on building, flying, and enjoying recovery. These engines are made to the same quality standards Estes flyers count on, so you get dependable results whether you are teaching a newcomer or polishing a weekend launch routine.\u003c\/p\u003e\n\u003cp\u003eThe A3-2T works with a wide range of our mini kits including Star Hopper, The Gnome, The Firestreak, Gryphon, Mini Honest John and many others. Its modest impulse and 2 second delay are best for rockets and small payloads that benefit from a short coast before descent. Consult your rocket kit flight data to match the engine to the model for the safest, highest performing flights.\u003c\/p\u003e\n\u003cp\u003eEach pack contains four A3-2T engines along with starters and mini starter plugs so you have what you need for multiple flights. Always follow the included safety instructions and local launch site rules. Ready to add consistent, fun flights to your next launch day? Pick up a pack and get airborne.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":52968869003569,"sku":"010012","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010012-A3-2T-Rocket-Engines.png?v=1772238551"},{"product_id":"1-4a3-3t-engine-bulk-pack","title":"1\/4A3-3T Engine Bulk Pack","description":"\u003cp\u003eThe Estes 1\/4A3-3T Engine Bulk Pack gives you the freedom to fly more often with one of the most consistent mini engines in model rocketry. Designed specifically for lightweight rockets, this compact engine delivers a gentle but reliable boost that keeps flights controlled, recoveries easy, and your rockets ready to fly again and again.\u003c\/p\u003e\n\n\u003cp\u003eWhat makes the 1\/4A3-3T stand out is its consistency. Each engine is engineered to produce steady thrust, helping rockets lift cleanly off the pad and follow a predictable flight path. That kind of reliability is perfect for refining builds, testing performance changes, or simply enjoying flights that behave exactly how you expect.\u003c\/p\u003e\n\n\u003cp\u003eWith a total impulse of 0.625 N sec and a 3 second delay, this engine is tuned for small scale flights where precision matters. The short thrust duration and lightweight design make it ideal for delicate airframes, including balsa and foam rockets, where a softer boost reduces stress and helps extend the life of your models.\u003c\/p\u003e\n\n\u003cp\u003eThis bulk pack is made for rocketeers who want to keep flying without interruption. Whether you are squeezing in flights after work or spending the day at the field, having a reliable stash of 1\/4A3-3T engines means more launches, more testing, and more time doing what you enjoy. Always follow Estes safety guidelines and local launch regulations for the best experience.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":53736139489585,"sku":"001699","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/1699-Qtr-A3-3T-Model-Rocket-Engine-Bulk-Pack.png?v=1780081591"},{"product_id":"a3-6t-engines","title":"A3-6T Engines","description":"\u003cp\u003eExperience better sight lines and a calmer recovery with the Estes A3-6T mini rocket engine. This 13mm motor is tuned to deliver a short, energetic boost followed by a six second delay, so your model reaches its highest point and then pauses before the recovery system activates. The result is a cleaner, more dramatic flight that is easy to track from the ground.\u003c\/p\u003e\n\u003cp\u003eWhat makes the A3-6T stand out is its consistency. Estes engines are manufactured and tested to provide repeatable thrust curves and predictable delay times, which means fewer surprises on launch day and more confidence when flying with friends or family. That steady performance helps new flyers learn timing and recovery and gives experienced hobbyists the reliability they need to plan flights precisely.\u003c\/p\u003e\n\u003cp\u003eOn the pad the A3-6T feels familiar and safe: a crisp ignition, a confident boost, and a gentle coast that showcases both altitude and stability. It is an excellent choice for lightweight rockets and small payload lofts where visibility and controlled recovery matter. Use it with many of our mini-friendly kits to get the most out of your neighborhood launches or club meetups.\u003c\/p\u003e\n\u003cp\u003eEach pack includes four A3-6T engines and the simple accessories you need to get flying. If you want predictable, fun flights that are easy to track and recover, the A3-6T is a dependable mini motor to add to your launch bag.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eATTENTION:\u003c\/strong\u003e \u003cem\u003eEstes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.\u003c\/em\u003e\u003c\/p\u003e","brand":"Estes Rockets","offers":[{"title":"Default Title","offer_id":54149864882481,"sku":"010014","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0220\/0369\/files\/010014-A3-6T-Model-Rocket-Engines.png?v=1778274163"}],"url":"https:\/\/estesrockets.com\/collections\/single-stage-engines.oembed","provider":"Estes Rockets","version":"1.0","type":"link"}